Prince William County is a country in North America. It borders Virginia to the north, south, and west, and the Potomac River to the southeast. It also has a maritime border with Maryland on the other side of the Potomac. As of 2025, Prince William County has a population of 482,204 citizens. The capital city of Prince William County is Manassas and the largest city is Dale City.
Originally part of Virginia since 1608, Prince William County unilaterally seceded on October 19, 2023. This resulted in a war of independence against the Virginian Government. Eventually, after Virginia’s military committed war crimes, the United Nations took control of Prince William County in June 2024 and would administer it until its independence was recognized on November 5, 2025.